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Mogno

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Mogno is the popular name of the species Swietenia macrophylla found in South and Central America. ( Photo: Public Domain)

The Mogno beamline will be dedicated to obtaining three-dimensional images of different materials, quickly, non-invasively, quantitatively and with high resolution.

The big advantages of X-ray tomography with high brightness synchrotron light are better image contrast and greater spatial and temporal resolution. Furthermore, the quantitative analysis and identification of density and different materials is possible, since the effect of beam hardening is eliminated by monochromaticity of the beam. The detection of details of less than 1 $latex \mu \rm m$ in millimeter-size samples are somewhat routine, even in the current tomography beamline in the UVX synchrotron light source, IMX. However, in the Mogno beamline, the gain in energy, in flux at the sample (more than a thousand times greater) and source size (almost one hundred times smaller) will lead tomographic analyzes to a globally competitive level.

The optics of this beamline will be one of the simplest in Sirius. The main element consists of a multilayer monochromator allowing greater bandwidth (1%), but still monochromatic. This technology is already used in some the beamlines in UVX and allows for gains in flux of almost 100 times compared to Si crystals monochromators. The monochromator is installed as a first optical element of the beamline, aimed to collect about 1-2 $latex \mu \rm rad$ of the radiation in the horizontal direction, which is collimated by a sagittal curvature on the second multilayer.

The experimental station will be translated along the experimental hut to control the vertical lighting of beam. Various sensors based on direct detection, such as Medipix, or indirect detection such as CCDs will be available, covering fields of view from 0.5 mm x 0.5 mm to 30 mm x 30 mm, to resolutions of the order of 0.25 x $\mu \rm m$ x 0.25 $ \mu \rm m$ to 15 $\mu \rm m$ x 15 $ \mu \rm m$, respectively. With the extremely small size of the dipole source (25 $\mu \rm m$ x 10 $\mu \rm m$ FWHM), phase contrast methods can also be employed with the good coherence of the source.